Nippon Piston Ring Kabushiki Kaisha
Patent Applications and Registrations
Patent applications and USPTO patent grants for Nippon Piston Ring Kabushiki Kaisha.The latest application filed is for "rotary sleeve of a rotary compressor".
- Nippon Piston Ring Kabushiki Kaisha - Tokyo JP
- Nippon Piston Ring Kabushiki Kaisha - Toyota JA
- Nippon Piston Ring Kabushiki Kaisha - Toyko JA
| Patent | Date |
|---|---|
| Rotary sleeve of a rotary compressor Grant 4,573,891 - Sakamaki , et al. March 4, 1 | 1986-03-04 |
| Floating rotary sleeve of a rotary compressor Grant 4,561,835 - Sakamaki , et al. December 31, 1 | 1985-12-31 |
| Rotary air pump or compressor with flexible end sealing plates Grant 4,061,446 - Sakamaki , et al. December 6, 1 | 1977-12-06 |
| Dry air rotary pump or compressor Grant 4,050,855 - Sakamaki , et al. September 27, 1 | 1977-09-27 |
| Piston Ring Grant 3,806,139 - Suzuki , et al. April 23, 1 | 1974-04-23 |
| Piston Ring And Process Of Making The Same Grant 3,671,047 - Umezawa June 20, 1 | 1972-06-20 |
| Oil Scraper Ring Grant 3,623,739 - Sugahara November 30, 1 | 1971-11-30 |
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